Zak and the team investigate paranormal occurrences at La Purisima Mission in Lompoc, CA. The former Spanish residence of padres, soldiers and the native Chumash is beautiful, but the air around it is heavy with the tragedy of disease and war.

Ghost Adventures confronts the spirits of the Old West in Tombstone, AZ. The Bird Cage Theater embodied the heyday of the silver boom. Legendary gunslingers, gamblers and prostitutes drank and died in the theater, and some even stayed to haunt it.

The Castillo de San Marcos was built in the 1600s by Spanish settlers in St. Augustine, Florida, the oldest city in America. More than 300 years later, the fort is still defended by the spirits of soldiers and haunted by the prisoners once locked inside.

Zak, Nick and Aaron are off to Ione, CA, to investigate Preston Castle -- a reformatory that once housed juvenile offenders and abandoned children. Its dark history includes an unsolved murder, countless instances of corporal punishment and many tragic deaths.

The team goes to Philadelphia to investigate the abandoned Eastern State Penitentiary. Driven insane by solitary confinement, torture and disease, the inmates suffered an ugly and violent existence. Their angry spirits continue to roam the corridors.

Zak, Nick and Aaron head to Natchitoches, LA, to investigate the Magnolia Plantation. Many slaves labored and died at this cotton plantation, which was built in 1830. The crew looks for evidence of voodoo rituals slaves may have used to seek revenge on the owners.

Zak, Nick and Aaron visit Savannah, GA, to investigate the Moon River Brewing Company. The building survived General Tecumseh Sherman and has seen its share of feuds, fights and lynchings. Today a ghost named Toby haunts the billiard room and other spirits lurk.

The Ghost Adventures team travels to England to investigate the Ancient Ram Inn. Built around 1145, its long dark history includes a pagan burial ground, ritual sacrifices of children and a possible connection to Stonehenge.

Poveglia Island, off the coast of Venice, Italy, is one of the world's darkest epicenters. According to legend, the island was formed from the ashes of burned plague victims, criminals and mental patients who were exiled there.

The abandoned Remington Arms factory in Bridgeport, CT, has a dark history. Once the largest supplier of munitions in the world, mysterious explosions, electrocutions and melted bodies have earned it a deadly reputation.

In its 96-year history, more than 150,000 criminals were confined to the towering cell blocks of the Ohio Reformatory in Mansfield. Today, their evil spirits still prey on women, the elderly and the weak as they carry out their eternal sentences.

Pennhurst State, a school for the developmentally disabled, was forced to close its doors in 1987 after numerous allegations of abuse and neglect. It's believed the tormented souls of the students still linger there.

Execution Rocks Lighthouse inhabits a deserted island in the middle of Long Island Sound. Etched into a landscape of rocks and isolated by water, the lighthouse's history is full of dark stories of shipwrecks, torture and a serial killer.

During its 7 decades of operation as a sanitarium and convalescent home, thousands perished in this once stately manor. Some locals affix rosary beads and crucifixes to the fence surrounding the property to keep the evil spirits inside.

This mansion, owned by a wealthy abolitionist, was once a stop on the underground railroad. A gateway to freedom for hundreds of slaves, it was also the last stop for many who arrived in terrible physical condition and died there.

Off the coast of Venice, Italy, there is an island that legend says was formed from the ashes of all the dead who were burned and buried there. Locals and tourists are forbidden from visiting. Fishermen avoid the area because they say it's cursed. Poveglia Island is one of the world's dark epicenters and most legendary haunts. Join Zak, Nick and Aaron as they are, for the first time, locked down on an island - all alone.